CN101271996A - Radio frequency recognizing electronic label antenna and method for producing the same - Google Patents
Radio frequency recognizing electronic label antenna and method for producing the same Download PDFInfo
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- CN101271996A CN101271996A CNA2008100547268A CN200810054726A CN101271996A CN 101271996 A CN101271996 A CN 101271996A CN A2008100547268 A CNA2008100547268 A CN A2008100547268A CN 200810054726 A CN200810054726 A CN 200810054726A CN 101271996 A CN101271996 A CN 101271996A
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Abstract
The invention relates to a radio frequency identification E-tag antenna and a preparation method thereof. The antenna comprises a support body and a conductive antenna pattern formed on the support body, the surface of the conductive antenna pattern is composed of metallic silver and a copper layer covered on the metallic silver. The quality of the copper occupies 35 percent to 95 percent of the total metal quality, while the square resistance value is more than 0 and smaller than 1 Omega/ Square. The antenna acquired by the invention is of low square resistance and good conductivity, while the preparation method is of simple process, high wiring precision, being suitable for industrialized production, lower cost and being able to flexibly match with different kinds of E-tags.
Description
Technical field
The present invention relates to a kind of electronic label antenna, particularly a kind of electronic label antenna that is used for radio-frequency (RF) identification.
Background technology
Radio-frequency (RF) identification (Radio Frequency Identification, be called for short RFID) technology, originate from the identification of friend or foe, IFF in the World War II, bring into use the seventies, beginning extensive use the nineties, is a kind of non-contact automatic identification technology of realizing based on radio frequency principle.The RFID technology is a core with wireless communication technique and large scale integrated circuit technology, utilize the coupling of radiofrequency signal and space thereof, transmission characteristic, drive the electronic tag circuit and launch unique coding of its storage, can discern automatically static or moving target, and obtain the target information data efficiently, by with Internet technology further combined with the target following and the information sharing that can also realize in the global range.
As a technology with wide application prospect, the RFID product has been widely used in logistics and supply chain management, false proof and various fields such as security control, traffic, production management and control, identification and tracking food security in recent years, its range of application has extended to the every aspect of our life, also creates a market that increases fast.At present many application tests both domestic and external prove, and RFID is having additional supply of the chain transparency, saving time and labor cost, aspect such as increase work efficiency have positive effect.Can predict that the RFID technology will become the important technology that 21 century changes the human lives.
Rfid system can be different in response to forming with different its, but substantially all be made up of electronic tag (Tag), read write line (Reader) and middleware several parts such as (Middle-ware).Wherein electronic tag is made up of chip and label antenna or coil, communicates by inductance coupling high or electromagnetic backscatter coupling principle and read write line.Label is equivalent to the bar code symbol in the barcode technology, and being used for storing needs to discern information transmitted; After label is identified, can carry out basic functions as read from internal memory.Along with developing rapidly of information technology, the use of RFID electronic tag will be very universal.
Label antenna is one of basic composition unit of electronic tag, and its performance and cost are directly determining the application of electronic tag, so the design of antenna is quite crucial with making for electronic tag.
At present, the manufacture method of common RFID electronic label antenna has following several:
(1) technique for coiling.Coiled antenna coil and it is fixed on a coiling instrument.After being welded to chip module on the antenna, aerial coil promptly is placed to and embeds on the film, and with adhesive it is carried out mechanical fixation.For the more non-contact IC card of coil turn, technique for coiling is to make the unique feasible method of aerial coil, this method reliability is higher, and be applied, but for the RFID electronic tag, cost is too high, and antenna pattern is limited, and lead minimum interval (precision promptly connects up) is difficult to be accurate to micron order.
(2) Wiring technique.On a PVC film chip is fixed to predetermined position, directly will go between with the ultrasonic vibration head embeds film substrate and finishes wiring.The lead localized heating that ultrasound transmitter device will be laid arrives to a certain degree, enables to fuse into also to fix its shape and position in the film thus.Mobile ultrasonic vibration head on the X-Y direction just can " be drawn " or cloth sets out aerial coil.Weld with the first and last end and the chip module of spot-welding equipment coil.This technology cost is also higher, and the wiring precision is not high.
(3) etch process.This is the standard method of producing printed circuit board.At first on a plastic film, cover the thick plane Copper Foil (or aluminium foil) of about 10～30 μ m of one deck, then at copper foil layer surface-coated photoresist.Behind overexposure, development, post bake, substrate is put into etch bath, the copper that is covered by photoresists can be not etched, stays desirable coil shape.Though be fit to large-scale production on this method technology,,, and be unfavorable for environmental protection so cost is also higher because etching will consume a large amount of metals.
(4) silk screen printing technology.The method of employing silk screen printing is printed on electrically conductive ink (being generally the silver slurry) on the flexible base, board and solidifies and obtains the conductive antenna coil.This method relatively is fit to large-scale production, but printed wiring precision, alignment precision remain to be improved, and the degree of purification of production environment is required also high, and the conductive silver paste price is high and unstable in addition, and this all will increase the cost of printed antenna.
Shortcomings such as in sum, the manufacture method of above-mentioned label antenna all exists the wiring precision low as can be seen, and cost is higher.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of electric conductivity frequency identification electronic label antenna preferably.
Shortcomings such as another technical problem to be solved by this invention provides a kind of preparation method of frequency identification electronic label antenna, and is low to overcome the wiring precision that existing electronic label antenna manufacture method exists, and cost is higher.
For solving the problems of the technologies described above, the technical scheme that the present invention takes is:
A kind of frequency identification electronic label antenna, comprise support and formed conductive antenna pattern thereon, the surface of described conductive antenna pattern is made of argent and the copper layer of going up plating thereof, and the quality of copper accounts for 35%～95% of total metal mass, its side's resistance greater than 0 less than 1 Ω/.
The thickness of above-mentioned conductive antenna pattern is 1～15 μ m.
Above-mentioned support is pet film or paper substrate.
A kind of preparation method of frequency identification electronic label antenna may further comprise the steps:
Silver coating salt deposit on support;
The silver salt layer is imposed the antenna pattern exposure, after development, photographic fixing are handled, obtain containing the antenna pattern of argent;
To containing the antenna pattern metal lining copper of argent, obtain frequency identification electronic label antenna.
Support among the present invention can use by pet resin (PET), diacetate resin, triacetate resin, polyethylene, polypropylene, polystyrene, Corvic, polyketone ether, the single or multiple lift film that polysulfones, polyether sulfone, Merlon, polyamide, acrylic resin, Triafol T etc. constitute etc., wherein PETG (PET) film is as optimal supporting body material, but consider factors such as processability, practicality, price, also can adopt paper substrate as support.
Comprise silver halide in the layer of silver salt described in the present invention, its preparation method can be made according to known silver emulsion manufacture method in the sensitive photographic material field.Silver emulsion normally forms by halide solutions such as silver nitrate aqueous solution and sodium chloride or KBr are mixed to make under the condition that gelatin exists.
Employed silver halide among the present invention is preferably the chlorine silver bromide, contains 50% or more chloride ion in promptly forming, and can contain bromide ion and iodide ion.Grain sizes is 0.1～1000nm, more preferably 50-300nm.The crystal shape of silver halide is unrestricted, can be cube, octahedron, spheroid, flat particle or laminar contraction crystalline substance, is preferably cube.
In order to obtain higher contrast, need doped metal ion, particularly transition metal ions such as rhodium and iridium in the silver emulsion.Rhodium ion has different ligand compounds with iridium ion, and ligand comprises cyanide ion, halide ion, thiocyanate ion, nitrosyl radical ion, water and hydroxide ion etc.The preferable amount of every moles of silver is 10
-10～10
-2Mole, more preferably consumption is 10
-9～10
-3Mole.
In the present invention, the silver salt layer can adopt coating methods such as dip-coating, extrusion coated, slip coating, curtain are coated with, rod is coated with, air knife applies, roller coat to be coated with, preferred extrusion coated.
Among the present invention, can also adopt above-mentioned coating method on the silver salt layer, to be coated with protective layer.
Can directly adopt laser explosure that antenna pattern is directly scanned on the silver salt layer to the exposure of silver salt layer, also can use uviol lamp or high-pressure mercury lamp as exposure light source, the mask that will have antenna pattern is printed on the silver salt layer.
After exposure is finished, develop again, the processing of photographic fixing.Can select conventional silver halide photographic material used known developer solution, fixing solution for use, but preferably use high-contrast developer, as commercially available D-19, D-72, D-11, D-8 and G-48 etc.After handling, exposure, development, photographic fixing form the antenna pattern that contains argent.
Containing metal lining copper on the antenna pattern of argent, can adopt electroless copper plating method or other copper electroplating methods (as electroplating etc.), the present invention preferentially adopts electroless copper plating method.
Electroless copper is the support that has the argent antenna pattern to be put into copper plating bath carry out electroless copper.Chemical bronze plating liquid generally is made up of mantoquita, complexing agent, reducing agent and other additive.Mantoquita provides the copper ion that is deposited, and can use soluble copper salts such as copper sulphate, Schweinfurt green or copper chloride; Reducing agent is that the copper ion with the solubility in the plating bath is reduced into metallic copper and is deposited on the argent antenna pattern on the support and forms metallic copper coating; Reducing agent can adopt materials such as formaldehyde, boron hydracid sodium, sodium hypophosphite; Complexing agent is to prevent to take place the Kocide SD precipitation to produce in alkalescence, copper ion is become the complex ion state, help crystal grain thinning, also help improving the stability of deposition velocity and solution, improve the performance of chemical plating copper layer, complexing agent commonly used has tartrate, EDTA, citrate, triethanolamine, 1,2-diaminocyclohexane tetraacetic acid or ethylenediamine etc., general adopt single complexing agent, also have and adopt the mixed twine mixture.The unsteadiness of copper electrolyte is the disadvantage of chemical bronze plating liquid, so generally introduce stabilizer, for example α, α '-bipyridine, three pyridines, thiocarbamide, mercapto benzothiazole.Also add nonionic surface active agent or anionic surfactant in addition and improve coating character, as adding polyethylene glycol (M=1000), polyoxyethylated alkyl phenol etc.
Adopt formaldehyde to make reducing agent in the chemical bronze plating liquid, but formaldehyde is poisonous, and volatile, contaminated environment is detrimental to health.
The present invention has studied respectively with formaldehyde and sodium hypophosphite and has made reducing agent, the oxidation reaction of sodium hypophosphite must take place on catalytic surface, since the copper catalysis that reaction is not deposited, so need adding minor amount of nickel ion to do the self-catalysis agent in the plating bath, self-catalyzed reaction is proceeded.
In order to prevent the metallic copper oxidation, need carry out Passivation Treatment to the copper surface.Passivation Treatment can plate one deck gold or silver or nickel again on the copper surface, and the method for employing has electrogilding, chemical gilding, chemical silvering, and chemical nickel plating etc., these needs according to practicality are selected.
The electronic label antenna of Zhi Zaoing can be made into various antenna patterns according to the design needs as mentioned above, and unrestricted.
The electronic label antenna of Zhi Zaoing as mentioned above, antenna wiring (precision promptly connects up) at interval can be as accurate as micron order, and the I of antenna live width and distance between centers of tracks reaches 10 microns.
The frequency identification electronic label antenna that adopts preparation method provided by the invention to make, the surface of its conductive antenna pattern is made of argent and the copper of going up plating thereof, the quality of its copper accounts for 35%～95% of total metal mass, its side's resistance greater than 0 less than 1 Ω/.
The thickness of the conductive antenna pattern behind the metal lining can at random change according to desirable characteristic, but preferred 1～15 μ m, if it is thinner than this scope, then can not get desirable side's resistance sometimes, if it is thicker than this scope, though then no problem, even reduce the effect that the plating efficiency of operation also is difficult to expect the side's of having resistance reduction.
Electronic label antenna provided by the invention can be fitted to encapsulate and be obtained electronic tag with chip.
Frequency identification electronic label antenna provided by the invention, its side's resistance is low, good conductivity; Its preparation method technology is simple, and wiring precision height is fit to suitability for industrialized production, and cost is lower, can mate the electronic tag of different cultivars flexibly, and application prospect is very wide.
Embodiment
The present invention is further detailed explanation below in conjunction with specific embodiment, but be not limited thereto.
Embodiment 1
1. the preparation of silver emulsion and print
Manufacture method according to the employed silver emulsion of silver halide photography photosensitive material prepares emulsion.The component of silver emulsion is a silver bromide emulsion, and wherein silver bromide is that 98% mole of % and silver iodide are 2% mole of %.The emulsion average grain diameter is 0.09 micron, and K mixes in the emulsion
2IrCl
6And K
3RhBr
6Emulsion further carries out sulphur, aurification sensitizing with gold potassium chloride and sodium thiosulfate.Then it is coated on the PET film equably, the silver coating amount be 4.2 the gram/square metre, make corresponding print after the drying.
2. exposure, development
The print that said method is made exposes with ultraviolet light or visible light earlier, exposed mask is the template that contains two groups of parallel lines, wherein A group parallel lines live width, spacing are 15 millimeters, and B group parallel lines live width, spacing are 10 microns, and line length all is 50 millimeters.Develop with following developer solution then, use the photographic fixing of F-5 fixing solution again, clean with deionized water rinsing, make the silver-colored line pattern of corresponding two groups of different live widths and spacing.
The composition of developer solution
Anhydrous sodium sulfite 100 grams
Hydroquinones 30.0 grams
Phenidone 1.5 grams
NaOH 25.0 grams
KBr 3.5 grams
BTA 1.0 grams
Add water to 1.0 liters
3. electroless copper
Above-mentioned silver-colored line pattern print is put into following plating bath carry out electroless copper, the pH value of regulating plating bath with NaOH is 12.5, and copper facing is 5 minutes under 25 ℃ of conditions, and washing and drying obtains sample of the present invention-1, tests its performance (table 1).
Chemical bronze plating liquid:
| Title | Content (mM/L) |
| Copper sulphate | 60 |
| Triethanolamine | 180 |
| Potassium ferrocyanide | 0.002 |
| Bipyridine | 0.013 |
| Formalin | 235 |
| Methyl alcohol | 210 |
Embodiment 2
1. silver emulsion and print preparation
Manufacture method according to the employed silver emulsion of silver halide photography photosensitive material prepares emulsion.The component of silver emulsion is a chlorine silver bromide emulsion, and wherein silver chlorate is that 70% mole of % and silver bromide are 30% mole of %.The emulsion average grain diameter is 0.23 micron, and K mixes in the emulsion
2IrCl
6And K
3RhBr
6Emulsion further carries out sulphur, aurification sensitizing with gold potassium chloride and sodium thiosulfate.Then it is coated on the paper substrate equably, the silver coating amount be 3.0 the gram/square metre, make corresponding print after the drying.
2. exposure, development
The print that said method is made exposes with ultraviolet light or visible light earlier, exposed mask is the template that contains two groups of parallel lines, wherein A group parallel lines live width, spacing are 15 millimeters, and B group parallel lines live width, spacing are 50 microns, and line length all is 50 millimeters.Develop with following developer solution then, use the photographic fixing of F-5 fixing solution again, clean with deionized water rinsing, make the silver-colored line pattern of corresponding two groups of different live widths and spacing.
The composition of developer solution:
Anhydrous sodium sulfite 100 grams
Hydroquinones 12.0 grams
Mitouer 2.0 grams
Sodium carbonate 75 grams
KBr 4.0 grams
KI 0.02 gram
Add water to 1.0 liters
3. electroless copper:
Chemical-copper-plating process is with example 1, but copper facing is extended for 8 minutes, makes sample of the present invention-2, tests its performance (table 1).
Embodiment 3
1. silver emulsion and print preparation
With embodiment 2.
2. exposure, development
The print that said method is made exposes with ultraviolet light or visible light earlier, exposed mask is the template that contains two groups of parallel lines, wherein A group parallel lines live width, spacing are 15 millimeters, and B group parallel lines live width, spacing are 100 microns, and line length all is 50 millimeters.Develop with following developer solution then, use the photographic fixing of F-5 fixing solution again, clean with deionized water rinsing, make the silver-colored line pattern of corresponding two groups of different live widths and spacing.
The composition of developer solution
Anhydrous sodium sulfite 100 grams
Hydroquinones 30.0 grams
Phenidone 1.5 grams
NaOH 25.0 grams
KBr 3.5 grams
BTA 1.0 grams
Add water to 1.0 liters
3. electroless copper
Above-mentioned silver-colored line pattern print is put into following plating bath carry out electroless copper, the pH value of regulating plating bath with NaOH is 9.0, and copper facing is 30 minutes under 35 ℃ of conditions.Washing and drying obtains sample of the present invention-3, tests its performance (table 1).
Chemical bronze plating liquid:
| Title | Concentration (mM/L) |
| Copper sulphate | 24 |
| Natrium citricum | 67 |
| Sodium hypophosphite | 270 |
| Boric acid | 300 |
| Nickelous sulfate | 2 |
Embodiment 4
1. silver emulsion and print preparation
With embodiment 2.
2. exposure, development
The film print that said method is made exposes with ultraviolet light or visible light earlier, exposed mask is the template that contains two groups of parallel lines, wherein A group parallel lines live width, spacing are 15 millimeters, and B group parallel lines live width, spacing are 150 microns, and line length all is 50 millimeters.Develop with following developer solution then, use the photographic fixing of F-5 fixing solution again, clean with deionized water rinsing, make the silver-colored line pattern of corresponding two groups of different live widths and spacing.
The composition of developer solution
Anhydrous sodium sulfite 100 grams
Hydroquinones 30.0 grams
Phenidone 1.5 grams
NaOH 25.0 grams
KBr 3.5 grams
BTA 1.0 grams
Add water to 1.0 liters
3. electroless copper
Above-mentioned silver-colored line pattern print is put into following plating bath carry out electroless copper, the pH value of regulating plating bath with NaOH is 9.5, and copper facing is 40 minutes under 40 ℃ of conditions.Washing and drying obtains sample of the present invention-4, tests its performance (table 1).
Chemical bronze plating liquid:
| Title | Concentration (mM/L) |
| Copper sulphate | 50 |
| Natrium citricum | 67 |
| Sodium hypophosphite | 270 |
| Boric acid | 400 |
| Nickelous sulfate | 2 |
| Bipyridine | 0.128 |
Embodiment 5
1. silver emulsion and print preparation
With embodiment 2.
2. exposure, development
Exposure: the mask graph of exposure among the embodiment 1 is set type by software, be input in the laser explosure instrument, adopt laser directly film to be exposed then, two groups of parallel lines are scanned on the silver salt layer.
Develop processing with embodiment 1.
3. electroless copper
With embodiment 3.Make sample of the present invention-5, test its performance (table 1).
Table 1: print performance table
| Embodiment | Copper accounts for the percentage of total metal mass, % | Live width (micron) | Distance between centers of tracks (micron) | Side's resistance (Ω/) | Thickness of coating, (micron) |
| Sample-1 | 35.2 | 10.2 | 10 | 0.090 | 2.5 |
| Sample-2 | 80.3 | 50.8 | 49.4 | 0.010 | 6.5 |
| Sample-3 | 59.5 | 100.5 | 99.6 | 0.025 | 4.3 |
| Sample-4 | 94.8 | 151.2 | 149.1 | 0.008 | 7.8 |
| Sample-5 | 59.5 | 10.1 | 9.8 | 0.028 | 4.1 |
The performance measurement method:
1. account for the percentage of total metal mass with chemico-analytic method copper test.
2. come testing conductive metal wire part side resistance with the D.C. resistance analyzer; Square resistance is defined as the resistance at the identical any opposite side of the next square of situation of thickness among the present invention.
3. test thickness of coating in the sample of the present invention with calibrator.
Data from table 1 as can be seen, with the antenna wiring precision height that method of the present invention is made, live width, spacing can reach 10 microns; Good conductivity, and coating is thick more, and square resistance is low more.
Claims (4)
1. frequency identification electronic label antenna, comprise support and the conductive antenna pattern that forms thereon, it is characterized in that, the surface of described conductive antenna pattern is made of the copper layer of argent and last plating thereof, the quality of copper accounts for 35%～95% of total metal mass, its side's resistance greater than 0 less than 1 Ω/.
2. according to the described frequency identification electronic label antenna of claim 1, it is characterized in that the thickness of described conductive antenna pattern is 1～15 μ m.
3. according to the described frequency identification electronic label antenna of claim 2, it is characterized in that described support is pet film or paper substrate.
4. a manufacturing is characterized in that as the preparation method of frequency identification electronic label antenna as described in the claim 1,2 or 3 it carries out as follows:
Silver coating salt deposit on support;
The silver salt layer is imposed the antenna pattern exposure, after development, photographic fixing are handled, obtain containing the antenna pattern of argent;
To containing the antenna pattern metal lining copper layer of argent, obtain frequency identification electronic label antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810054726 CN101271996B (en) | 2008-04-02 | 2008-04-02 | Radio frequency recognizing electronic label antenna and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810054726 CN101271996B (en) | 2008-04-02 | 2008-04-02 | Radio frequency recognizing electronic label antenna and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101271996A true CN101271996A (en) | 2008-09-24 |
| CN101271996B CN101271996B (en) | 2013-02-06 |
Family
ID=40005766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810054726 Active CN101271996B (en) | 2008-04-02 | 2008-04-02 | Radio frequency recognizing electronic label antenna and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101271996B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103390799A (en) * | 2012-05-11 | 2013-11-13 | 深圳光启创新技术有限公司 | Metamaterial and manufacturing method thereof |
| CN103947040A (en) * | 2011-09-14 | 2014-07-23 | 兰克森控股公司 | Rfid antenna |
| CN104226641A (en) * | 2014-08-19 | 2014-12-24 | 诺瓦特伦（杭州）电子有限公司 | Radio frequency tag acid and alkaline washing equipment |
| US9874815B2 (en) | 2016-05-13 | 2018-01-23 | Xerox Corporation | Chipless radio frequency identification (RFID) made using photographic process |
| CN109963406A (en) * | 2017-12-25 | 2019-07-02 | 宏启胜精密电子(秦皇岛)有限公司 | Has the flexible circuit board and preparation method thereof of embedded resistors |
| CN111740209A (en) * | 2020-06-17 | 2020-10-02 | 深圳市信维通信股份有限公司 | Preparation method of FPC die-cutting antenna |
| CN115466943A (en) * | 2022-10-05 | 2022-12-13 | 复旦大学义乌研究院 | Flexible ultrahigh frequency radio frequency tag system based on polyether-ether-ketone film |
Family Cites Families (2)
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| JP4239848B2 (en) * | 2004-02-16 | 2009-03-18 | 富士ゼロックス株式会社 | Microwave antenna and manufacturing method thereof |
| CN101005755B (en) * | 2006-12-12 | 2011-04-20 | 中国乐凯胶片集团公司 | Electromagnetic wave screening film and its producing method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103947040A (en) * | 2011-09-14 | 2014-07-23 | 兰克森控股公司 | Rfid antenna |
| CN103390799A (en) * | 2012-05-11 | 2013-11-13 | 深圳光启创新技术有限公司 | Metamaterial and manufacturing method thereof |
| CN104226641A (en) * | 2014-08-19 | 2014-12-24 | 诺瓦特伦（杭州）电子有限公司 | Radio frequency tag acid and alkaline washing equipment |
| US9874815B2 (en) | 2016-05-13 | 2018-01-23 | Xerox Corporation | Chipless radio frequency identification (RFID) made using photographic process |
| CN109963406A (en) * | 2017-12-25 | 2019-07-02 | 宏启胜精密电子(秦皇岛)有限公司 | Has the flexible circuit board and preparation method thereof of embedded resistors |
| CN109963406B (en) * | 2017-12-25 | 2021-10-19 | 宏启胜精密电子(秦皇岛)有限公司 | Flexible circuit board with embedded resistor and manufacturing method thereof |
| CN111740209A (en) * | 2020-06-17 | 2020-10-02 | 深圳市信维通信股份有限公司 | Preparation method of FPC die-cutting antenna |
| CN115466943A (en) * | 2022-10-05 | 2022-12-13 | 复旦大学义乌研究院 | Flexible ultrahigh frequency radio frequency tag system based on polyether-ether-ketone film |
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|---|---|
| CN101271996B (en) | 2013-02-06 |
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Owner name: CHINA LUCKY GROUP CORPORATION Free format text: FORMER NAME: CHINESE LEKAI FILM GROUP CO |
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Address after: South Street, new urban lucky 071054 Hebei province Baoding City No. 6 Patentee after: China Lucky Group Corporation Patentee after: Lucky Film Co., Ltd. Address before: 071054 Kennan street, Hebei, Baoding, No. 6 Patentee before: Chinese Lekai Film Group Co Patentee before: Lucky Film Co., Ltd. |